projects / deliverable / linux.git / blame
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|---|---|---|
| 6436b6a7 AK |
1 | /* linux/arch/arm/mach-s3c2416/pm.c |
| 2 | * | |
| 3 | * Copyright (c) 2010 Samsung Electronics Co., Ltd. | |
| 4 | * http://www.samsung.com | |
| 5 | * | |
| 6 | * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support) | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 4a858cfc | 13 | #include <linux/device.h> |
| bb072c3c | 14 | #include <linux/syscore_ops.h> |
| 6436b6a7 AK |
15 | #include <linux/io.h> |
| 16 | ||
| 17 | #include <asm/cacheflush.h> | |
| 18 | ||
| 6436b6a7 AK |
19 | #include <mach/regs-s3c2443-clock.h> |
| 20 | ||
| 21 | #include <plat/cpu.h> | |
| 22 | #include <plat/pm.h> | |
| 23 | ||
| 14cce0e7 KK |
24 | #include "s3c2412-power.h" |
| 25 | ||
| 4f506daf | 26 | #ifdef CONFIG_PM_SLEEP |
| 6436b6a7 AK |
27 | extern void s3c2412_sleep_enter(void); |
| 28 | ||
| 29cb3cd2 | 29 | static int s3c2416_cpu_suspend(unsigned long arg) |
| 6436b6a7 | 30 | { |
| 6436b6a7 AK |
31 | /* enable wakeup sources regardless of battery state */ |
| 32 | __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG); | |
| 33 | ||
| 34 | /* set the mode as sleep, 2BED represents "Go to BED" */ | |
| 35 | __raw_writel(0x2BED, S3C2443_PWRMODE); | |
| 36 | ||
| 37 | s3c2412_sleep_enter(); | |
| 29cb3cd2 | 38 | |
| d3fcacf5 AK |
39 | pr_info("Failed to suspend the system\n"); |
| 40 | return 1; /* Aborting suspend */ | |
| 6436b6a7 AK |
41 | } |
| 42 | ||
| 43 | static void s3c2416_pm_prepare(void) | |
| 44 | { | |
| 45 | /* | |
| 46 | * write the magic value u-boot uses to check for resume into | |
| 47 | * the INFORM0 register, and ensure INFORM1 is set to the | |
| 48 | * correct address to resume from. | |
| 49 | */ | |
| 50 | __raw_writel(0x2BED, S3C2412_INFORM0); | |
| 51 | __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1); | |
| 52 | } | |
| 53 | ||
| 04511a6f | 54 | static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif) |
| 6436b6a7 AK |
55 | { |
| 56 | pm_cpu_prep = s3c2416_pm_prepare; | |
| 57 | pm_cpu_sleep = s3c2416_cpu_suspend; | |
| 58 | ||
| 59 | return 0; | |
| 60 | } | |
| 61 | ||
| 4a858cfc KS |
62 | static struct subsys_interface s3c2416_pm_interface = { |
| 63 | .name = "s3c2416_pm", | |
| 64 | .subsys = &s3c2416_subsys, | |
| 65 | .add_dev = s3c2416_pm_add, | |
| bb072c3c RW |
66 | }; |
| 67 | ||
| 68 | static __init int s3c2416_pm_init(void) | |
| 6436b6a7 | 69 | { |
| 4a858cfc | 70 | return subsys_interface_register(&s3c2416_pm_interface); |
| 6436b6a7 AK |
71 | } |
| 72 | ||
| bb072c3c | 73 | arch_initcall(s3c2416_pm_init); |
| 4f506daf | 74 | #endif |
| bb072c3c RW |
75 | |
| 76 | static void s3c2416_pm_resume(void) | |
| 6436b6a7 AK |
77 | { |
| 78 | /* unset the return-from-sleep amd inform flags */ | |
| 79 | __raw_writel(0x0, S3C2443_PWRMODE); | |
| 80 | __raw_writel(0x0, S3C2412_INFORM0); | |
| 81 | __raw_writel(0x0, S3C2412_INFORM1); | |
| 6436b6a7 AK |
82 | } |
| 83 | ||
| bb072c3c | 84 | struct syscore_ops s3c2416_pm_syscore_ops = { |
| 6436b6a7 AK |
85 | .resume = s3c2416_pm_resume, |
| 86 | }; |